package com.ethan.interceptors;


import com.ethan.utils.JwtUtil;
import com.ethan.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //验证令牌
        String token = request.getHeader("Authorization");
        //验证token
        try {
            //从redis中获取相同的token
            String redisToken = stringRedisTemplate.opsForValue().get(token);
            //token失效
            if(redisToken == null){
                throw new RuntimeException();
            }
            Map<String, Object> claims = JwtUtil.parseToken(token);
            ThreadLocalUtil.set(claims);
            return true;
        } catch (Exception a){
            response.setStatus(401);
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空拦截器中的内容
        ThreadLocalUtil.remove();
    }
}
